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<html lang="en">

<head>
    <meta charset="UTF-8">
    <meta name="viewport" content="width=device-width, initial-scale=1.0">
    <title>Document</title>
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<body>
    <script>
        //创建
        var arr = new Array(); //new
        var arr_1 = []; //利用字面量
        var arr_2 = [1, 2, 3, 4];
    </script>
</body>

</html>